Lowering 2018 A4?

I am new to this forum, So let me say Hello to all first, I traded in my 14 A4 and bought a 2018 A4 Quattro Premium Plus, I think I want to lower it, It has the 19" wheels and it sits a bit lower than my old A4 but it could drop down another 1" or 2. Where would I get a good lowering kit? What kind of issues might I run into? I am thinking I will need to do something with the auto leveling headlights? What else am I looking at? I really like the adjustable ride control I have now and don't want to loose that. Right now it adjust between, Comfort, Dynamic, or Custom. Thanks for your input.